Backing roll chuck latch



June 2, 1936; H. H. TALBOT 2,042,872

BACKING ROLL CHUCK LATCH Filed Feb. l8, 1955 2 Sheets-Sheet l WITNESSESINVEOR. Z flmyyzzz g ;2 M BY m, musfli z f ATTORNEYS Patented June 2,1936 STATES T G F F I C E United Engineering & Foundry Company,

Pittsburgh, Pa., a corporation of Pennsylvania Application February 18,1935, Serial No. 6,950

14 Claims.

This invention pertains to rolling mills and more particularly to alatching mechanism for holding the bearing chucks for the necks of themill rolls against endwise displacement in the roll housings.

Heretofore it has been the customary practice to provide a plurality ofremovable plates, or clamps, for holding the bearing chucks for the rollnecks of the mill rolls in place and usually these plates are secured tothe roll housing of the mill by a plurality of bolts. Among theobjections to this practice is the inconvenience and difliculty which itinvolves in replacing the chucks when they are held in place by suchmeans, and in addition they are unsightly and costly as well as detractfrom the strength of the roll housings where the latter have to bedrilled for the reception of the clamp retaining bolts.

An object of this invention is to provide a simple, inexpensive andreadily adjustable latching mechanism for use in holding a roll chuck inplace in a roll housing which is adapted to permit the chuck beingreadily removed and replaced and which makes use of no bolts orequivalent means of a similar character which are difiicult and slow toremove and replace.

Another object is to provide a latching mechanism for holding a rollchuck in place in a roll housing which does not require the making ofany bolt holes in the housing.

Another object is to provide a latching mecha nism of this characterwhich does not involve any mutilation of the chuck-supporting structure.

It is also an object to provide a chuck for use on the backing rolls ofa backed-up working roll type of mill which is equipped with latches forboth holding itself in place in the roll housing and for holding theadjacent working roll chuck in place in it.

A further object is to provide a roll chuck which is adapted toreleasably engage the inner and outer faces of a roll housing withoutthe aid of screws or bolts.

These and various other objects, as well as the various other novelfeatures and advantages of the invention, will be readily apparent whenthe following detailed description is read in conjunction with theaccompanying drawings of which Fig. l is an elevational View of aportion of a rolling mill of the backed-up working roll typeillustrating a nested chuck assembly incorporating one embodiment of theinvention; Fig. 2 a horizontal sectional view taken on the line II-II ofFig. 1; Fig. 3 a fragmentary sectional view of the backing roll chuckretaining latch shaft and handle; and Fig. 4 a sectional view on theline IVIV of Fig. 1.

Referring in detail to the drawings, the numeral I designates the rollhousings generally of a rolling mill of the 4-high backed-up workingroll type. In the windows 2 of these housings there are shown in theconventional relation a Working roll '3' and a backing roll 1. The necks3a of these working rolls 3 are mounted in a pair of bearing chucks 5which are in turn nested for vertical and endwise adjustment in suitableopenings 6 provided therefor in the bottoms of the bearing chucks 1 inwhich the necks 4a of the backing roll 4 are supported. These latterchucks I are themselves mounted in the windows of the roll housings forvertical adjustment under the control of the adjusting screws 8.

In accordance with this invention to hold the backing roll chucks I inplace in the roll housings I one of them, and in the present embodimentthe one on the right as viewed in Fig. 2, is provided with shoulders 9on its outer lateral edges which are disposed to engage the outer faceof the roll housings I and while permitting the chuck to be slid intothe housing window 2 prevent it from moving inwardly beyond the pointwhere the shoulders 9 engage the housings I. To also hold such chuckagainst outward movement when in its operative position it is equippedat each side opposite the neck 5a of the backing roll 4 with areleasablelatch I I which is mounted on the inner end of an actuatingshaft I2 and disposed for movement in a recess I3 in the side of thechuck. This shaft I2 is extended for convenience in operating the latchto the outer faceof the chuck and equipped with a turning handle I4,which is mounted on a reduced portion I2a thereof projected beyond theface of the chuck. In the con struction shown. the shaft I2 is providedat its inner end with a non-circular portion I2b which is fitted in acorrespondingly shaped opening in the latch II and to hold it in place aplate I5 disposed to engage the shoulder formed by the reduction I2a isbolted to the outer face of the chuck.

Referring to Figs. 1 and 3, to normally hold the latch in either itsengaged or disengaged position it is so designed that when in one or theother of these positions it is held there by gravity. To positivelyprevent it from moving out of either of such positions, however, alocking pin I1 is provided in the handle I l and arranged to engageholes I6 provided in the plate I5 for such purrespectively. This pin ispreferably mounted for axial movement in the handle l4 and equipped witha spring l8 which is disposed to constantly urge it into the holes l6.As shown the recess l3 in which the latch l I is arranged is preferablydesigned to completely conceal the latch when in its inoperativeposition. In addition the latch is equipped with a tail-piece Ila whichengages the inner wall of the recess l3 and prevents the latch movingoutwardly beyond its operative position whereby avoiding any possibilityof its falling and injuring a workman while a roll is being changed.

While the retaining latches H may .be provided on the chucks at bothends of the rolls, it is not necessary as the chucks are all securedagainst axial movement on the rolls.. Although this may be accomplishedin various ways, in the structure illustrated it is done by threadablymounting a retaining ring 22 on the outer end of the roll neck to engagea ring 23 disposed to engage the outer end of the inner race of theroller bearing assembly l9 and thereby force it against the tapered neckof the roll. To hold the upper race of the bearing assembly in place aring-like retaining plate 2i is secured by bolts 25 to the outer face ofthe chuck.

For holding the working roll chucks 5 in place in the backing rollchucks I where they are nested, one of the backing roll chucksassociated with each working roll, and preferably the one. can'ying thehousing engaging latches II, is' provided with a pair of latches 26.These, like the backing roll chuck latches II, are provided with asubstantial face 26a for engaging the working roll chucks and arepivotally supported by pins 21 extended through a pair of spacedbrackets 28 and 28a formed on the backing roll chucks, the pins beingheld in place by collars 23 keyed thereto between the two brackets 28and 23a. Adjacent the former of these brackets 28 and between it and thechuck proper a recess 3| is'provided for the reception of the latches 26and so shaped as to completely conceal the latch when moved to itsinoperative position. As illustrated, the latches 26 are disposedtoengage the outer face of the working roll chuck and prevent itsoutward movement, while to prevent inward movement of such chuck flanges32 are provided on the lateral edges thereof to engage the backing rollchucks. It will be appreciated however that axial movement of the chucksin either direction may be prevented by such latches alone if desired.

To retain the latches 26 in their operative and .inoperative positions.releasable stops 33 are provided, these being so located as to engagethe latches on one side when in one position and on the other side whenin the other position. Such stops may be either simply screw bolts, asshown, which must be unscrewed each time the latches are moved, orspring biased depressible stops, which may be simply forced into theface of the backing roll chuck to permit the latches to be movedthereover and automatically returned to their latch-engaging position assoon as the latches are moved past them.- In their preferred form theselatches are also so shaped and mounted that the ones on the upperbacking roll chuck at least will fall by gravity into their unlatchedpositions when the stops 33 are moved out of their way. However, toassure and simplify their movement into and out of the operative andinoperative positions they are keyed or otherwise fastened for rotationtherewith'on the pins 21 about which they are pivoted and these pinsprovided with non-circular ends projected beyond the faces of the rollhousings for the reception of a turning tool, not shown, by means ofwhich they may be readily turned by an operatorfrom one position toanother.

Like the backing roll chucks the working roll chucks are mounted againstaxial movement, on the rolls and hence latches 26 are necessary only 10at, one end. As shown in Fig. 4 an internal shoulder 34 is provided onthe inner end of the bearing-receiving opening in each of the workingroll chucks to engage the inner end of the bearing cage 35 mountedtherein, and this cage held 15 against axial movement on the roll neckby a collar 36 mounted on the inner end thereof, and a sleeve,3| mountedon its outer end, the latterbeing in turn held in place by an assembledretaining ring 38 mounted in a groove 39 provided :9 for its receptionadjacent the outer ends of the 7 roll necks.

In practicing this invention, as will be readily appreciated by thoseskilled in the art, the only operations necessary for releasing theworkinglzs roll chucks for removal is to disengage the latchengagingstops 33 and turn the latches 26 to their non-engaging positions. In thesame manner all that is necessary to release the backing roll chucks forremoval is to move the backing roll to chuck latches I l to theirnon-engaging positions.

According to the provisions of the patent statutes, I have explained theprinciple and construction of my invention and have illustrated anddescribed what I now consider to represent 30 its best embodiment.However, I desire to have it understood that, within the scope of theappended claims, the invention 'may be practiced otherwise than asspecifically illustrated and described.

I claim: 5

1. In a rolling mill of the backed-up working roll type, a rollhousinghaving a roll chuck receiving window init, a. working roll chuck,a

backing roll chuck adapted to be removably mounted in said .window' andto receive said working roll chuck, and a plurality of pivotallysupported latches mounted in recesses in the faces of said backing rollchuck adjacent said working roll chuck and the housing and movable 50-mounted in said window and to receive said work- 60 ing roll chuck, aplurality of pivotally supported latches mounted in recesses in thefaces of said backing roll chuck adjacent said roll housing andremovable into and out of enga ement therewith for holding it againstendwise movement 5 I in the roll housing, and means operative betweenthe backing and working roll chucks for holding the working roll chuckagainst endwise movement in the backing roll chuck.

3. In a rolling'mill of the backed-up working roll type, a roll housinghaving a roll chuck receiving window in it, a working roll chuck,a;backing rollfchuck adapted to be removably mounted in said window andto receive said working roll chuck, a plurality of pivot-ally supportedlatches 15 mounted in recesses in the lateral faces of said backing rollchuck and movable into and out of engagement with said roll housing forholding it against outward endwise movement in the roll housing, meanson said backing roll chuck for limiting its inward movement, and aplurality of latches carried in recesses in the inner faces of saidbacking roll chuck and movable into and out of engagement with theworking roll chuck for holding the latter against endwise movement inthe backing roll chuck.

4. In a rolling mill of the backed-up working roll type, a rollsupporting housing having a roll chuck receiving window in it, a backingroll chuck adapted to be removably mounted in said window and to receiveand support a working roll chuck, shoulders on the lateral edges of saidbacking roll chuck for limiting its inward movement in said housing, aplurality of pivotally mounted latches carried in recesses in thelateral faces of said backing roll chuck and movable into and out ofengagement with the roll housing for preventing its outward movement insaid housing, a working roll chuck adapted to be mounted in said backingroll chuck, and a plurality of latches pivotally mounted in said backingrollchuck in recesses therein adjacent said working roll chuck andoperable into and out of engagement therewith for preventing outwardmovement of the working roll chuck in the backing roll chuck.

5. In a rolling mill of the backed-up working roll type, a rollsupporting housing having a roll chuck receiving window in it, a backingroll chuck adapted to be removably mounted in said window a plurality ofpivotally mounted latches carried in recesses in the lateral faces ofsaid backing roll chuck and movable into and out of engagement with theroll housing for preventing outward movement thereof in said housing, aworking roll chuck adapted to be mounted in said backing roll chuck,shoulders on the lateral edges of said working roll chuck for limitingthe inand operative for preventing outward movement of the working rollchuck in the backing roll chuck.

6. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably supportedin said window, and a plurality of latches pivotally supported inrecesses provided in the lateral faces thereof and operative forreleasable engaging said roll housing and holding said chuck againstendwise movement in said housing.

7. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably supportedin said window, shoulders on the lateral edges of said chuck forlimiting its inward movement in said housing, and a plurality of latchespivotally mounted in recesses in the lateral faces of said chuck andmovable into and out of engagement with said housing for holding itagainst outward movement in the housing.

8. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably supportedin said window, a plurality of concealed pivotally supported latchesoperative between said chuck and housing for releasably holding saidchuck against endwise movement in said housing, means located adjacentthe outer face of said housing for manipulating said latches, and meansassociated with said manipulating means for releasably look-- ing saidlatches in selected positions.

9. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably supportedin said window, a plurality of pivotally supported latches mounted insaid chuck for releasably holding it against endwise movement in saidhousing, a handle for manipulating each of said latches located adjacentthe outer face of said chuck, and a spring biased pin carried by each ofsaid handles disposed to engage in holes in the chuck for holding saidlatches in a selected position.

10. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably mounted insaid window, and a plurality of concealed pivotally supported latchesoperative between said chuck and housing for holding the chuck againstendwise movement in the housing, said latches being so designed as to beurged by gravity toward both their operative and inoperative positionsrespectively, when in such positions.

11. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck adapted to be removably mounted insaid window, a plurality of pivoted latches carried in recesses in thelateral faces of said chuck for locking it against endwise movement insaid housing, means for moving said latches from their non-engaging totheir housing-engaging positions, and means on said latch for limitingtheir movement out of the plane of the lateral faces of the chuck.

12. In a rolling mill, a roll supporting housing having a roll chuckreceiving window in it, a roll chuck having a roll neck receivingopening therein mounted in said window and adapted to be axially removedtherefrom, a chuck retaining ment with the center of said roll neckopening and disposed to releasably engage the housing to prevent axialdisplacement of the chuck.

13. In a rolling mill, a roll supporting housing having a window thereinfor receiving a roll neck chuck, a roll neck chuck adapted to beremovably supported in said window, and a plurality of latchesadjustably supported in recesses provided in the lateral faces thereofand operative for releasably engaging said housing and holding saidchuck against endwise movement in the housing.

14. A rolling mill comprising a housing member formed with a window, aroll neck chuck member slidably supported in the window and means forlocking the chuck member and housing member together which includes alatch adjustably supported in a recess in one member and operative toreleasably engage the other member.

HOWARD H. TALBOT.

